An intelligent monitoring device for chemical tank leakage based on multispectral imaging

Abstract

The present invention discloses an intelligent chemical storage tank leakage monitoring device based on multispectral imaging, which relates to the technical field of chemical safety monitoring and comprises a dynamic multispectral acquisition mechanism; the dynamic multispectral acquisition mechanism comprises a filter wheel multispectral acquisition component and an explosion-proof housing installed on the outside of the filter wheel. By using 12 filters corresponding to the characteristic wavelengths of different leakage media, combined with the angle and position adjustment functions of the filters, accurate spectral detection can be performed on various types of leakage media, effectively distinguishing the spectral characteristics of the tank anti-corrosion coating and the leakage medium, greatly reducing the false positive rate. In addition, the provision of a memory alloy linear drive and an electromagnetic coil makes the filter adjustment process highly automated, facilitating the overall device to automatically complete a series of processes from environmental processing, data acquisition to analysis and judgment, reducing manual maintenance operations and intervention, reducing maintenance costs and difficulty, and improving the service life and operating efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical safety monitoring, and in particular to an intelligent monitoring device for chemical storage tank leakage based on multispectral imaging. Background Art

[0002] In the chemical production process, chemical storage tanks are key equipment for storing various hazardous chemicals, and their leakage monitoring is crucial. Existing chemical storage tank leakage monitoring devices based on multispectral imaging face many technical bottlenecks in practical applications.

[0003] Currently, under complex operating conditions, strong direct sunlight can saturate the near-infrared spectrum, and dusty environments increase the scattering rate of the mid-infrared spectrum, resulting in a high rate of missed detection of weak leak signals. Furthermore, issues such as overlap between the spectral characteristics of the tank's anti-corrosion coating and the leaking medium, as well as interference from condensed water mist, result in a high rate of false positives in traditional single-channel detection. In dynamic environments, uncooled infrared sensors are significantly affected by temperature, with pixel response uniformity errors exceeding 10% for temperature differences greater than 15°C. This makes it easy to miss even the smallest leak thermal signals, necessitating the development of an intelligent chemical tank leak monitoring device based on multispectral imaging. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent chemical tank leakage monitoring device based on multispectral imaging to solve the problems raised in the above background technology, such as high missed detection and false detection rates under complex working conditions, insufficient detection stability in dynamic environments, high risks and costs of equipment calibration and maintenance, and inability to efficiently identify small leaks and accurately judge leakage conditions, which seriously threaten the safety of chemical production.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an intelligent monitoring device for chemical storage tank leakage based on multispectral imaging, comprising a dynamic multispectral acquisition mechanism;

[0006] The dynamic multi-spectral acquisition mechanism includes a filter wheel multi-spectral acquisition component and an explosion-proof housing mounted on the outside thereof, which is used to protect the filter wheel multi-spectral acquisition component. A dust adsorption and acquisition component is mounted on the front end of the explosion-proof housing, which is used to adsorb and collect dust at the front end of the explosion-proof housing to reduce the interference of dust on the dynamic multi-spectral acquisition mechanism;

[0007] The filter wheel multi-spectral acquisition component includes a gear wheel, an electromagnetic coil slot and a memory alloy linear driver. Twelve filter mounting slots are arranged at equal intervals along the circumferential direction on the gear wheel. A filter corresponding to the characteristic absorption peak wavelength of a specific leakage medium is installed in each filter mounting slot. A filter is installed in the filter mounting slot. The memory alloy linear driver is connected to the filter and is used to drive the filter to perform linear displacement in the filter mounting slot. A magnetic layer is provided on the outer circumferential side of the filter. An electromagnetic coil is embedded in the electromagnetic coil slot. When the filter is displaced into the electromagnetic coil slot, the electromagnetic coil in the electromagnetic coil slot generates a magnetic field, which interacts with the magnetic layer outside the filter to drive the filter to rotate at an angle to adjust the angle of the filter. A magnetic field controller is installed at the center end of the gear wheel.

[0008] Preferably, the filter adopts a three-layer coating structure, the outer layer is a super-hydrophobic polytetrafluoroethylene film, the middle layer is a silica anti-scratch layer, and the inner layer is a graphene thermal conductive layer. The bottom of the gear wheel is meshed and connected to a drive worm, and the side end of the drive worm passes through the explosion-proof housing and is connected to a drive motor.

[0009] Preferably, the dynamic multi-spectral acquisition mechanism also includes a cleaning component, which includes a laser ranging sensor and a compressed air purging device. The laser ranging sensor is used to detect the thickness of contaminants on the filter surface. When the thickness of the contaminants exceeds a preset threshold, the compressed air purging device is triggered to perform purging. The side end of the compressed air purging device is connected to a first rotating gear ring, and the side end of the first rotating gear ring is externally rotatably connected to a first ring rail.

[0010] Preferably, the side end of the first rotating gear ring is meshedly connected with the first driven gear, the side end of the first driven gear is connected to the bevel gear structure through a synchronization rod, and the side end of the bevel gear structure is connected to a synchronous pulley structure.

[0011] Preferably, a three-dimensional data collector is installed on the outer wall surface of the explosion-proof shell, which includes a laser projector and a binocular camera. The laser projector is used to project the Gray code pattern, and the binocular camera is used to collect D point clouds for real-time reconstruction of the tank surface morphology. A microprocessor is installed on the top of the explosion-proof shell.

[0012] Preferably, the dust adsorption and collection component includes a multi-angle adjustable microwave device, a negative pressure adsorption tube and a microfluidic sampler. The multi-angle adjustable microwave device is used to evaporate the water mist on the surface of the storage tank before detection. The negative pressure adsorption tube is used to rotate around the detection area to adsorb dust during monitoring. A negative pressure front-end adsorption head is installed at the front end of the negative pressure adsorption tube. The microfluidic sampler includes a microfluidic sampling channel and a built-in spectral detection chip. The microfluidic sampling channel automatically opens when a suspected leakage area is detected, and the leakage medium microsample is collected through the negative pressure front-end adsorption head. The sample flows through the built-in spectral detection chip for rapid component analysis.

[0013] Preferably, the dust adsorption and collection assembly further includes a synchronous connecting rod, the side end of the synchronous connecting rod is connected to an electromagnetic blocker, the side end of the electromagnetic blocker is provided with a second driven gear, the side end of the second driven gear is meshedly connected to a second rotating gear ring, the side end of the second rotating gear ring is externally rotatably connected to a second ring rail, and the multi-angle adjustable microwave device and the negative pressure adsorption tube are both provided on the surface of the second ring rail.

[0014] Preferably, a number of adsorption holes are equidistantly arranged on the surface of the negative pressure adsorption tube, a sleeve rod is installed at the side end of the negative pressure adsorption tube, the side end of the negative pressure front end adsorption head is connected to a sampling guide tube, the sampling guide tube is connected to the microfluidic sampler, and a dust storage tank is installed on the top wall surface of the sleeve rod.

[0015] Preferably, the dynamic multi-spectral acquisition mechanism further includes a flexible composite sensor array, which is composed of a pressure sensor, a temperature sensor and a humidity sensor. The flexible composite sensor array is attached to the surface of the storage tank and is used to monitor the pressure distribution, temperature and humidity changes on the surface of the storage tank in real time.

[0016] Preferably, the flexible composite sensor array is connected to the external multispectral monitoring structure and the microprocessor respectively through a wireless transmission module, and is used to jointly process and analyze the data of three-dimensional data acquisition, component verification and environmental perception with the multispectral imaging data in the external multispectral monitoring structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, by cooperating with the filter wheel multi-spectral acquisition component, 12 The device utilizes filters corresponding to the characteristic wavelengths of different leaking media, combined with the filter's angle and position adjustment capabilities, to accurately detect a variety of leaking media. This allows for effective differentiation between the spectral characteristics of the tank's anti-corrosion coating and the leaking media, significantly reducing the false positive rate. Furthermore, a 3D data collector reconstructs the tank's surface topography in real time, enabling detection of surface structural changes caused by leaks. A microfluidic sampler analyzes the composition of the leaking media, and multi-source data fusion enables more comprehensive and accurate detection. The filter's three-layer coating reduces damage to the filter from external factors, reducing the frequency of filter replacement, ensuring the device's optical performance and overall operational stability in complex environments, and improving detection reliability. The combination of a memory alloy linear actuator and electromagnetic coils automates the filter adjustment process, enabling the entire device to automatically complete a series of processes from environmental processing and data collection to analysis and judgment. This reduces manual maintenance operations and intervention, lowers maintenance costs and difficulty, and increases the equipment's service life and operational efficiency. Furthermore, comprehensive analysis of multiple data allows for early detection of potential risks and preventive maintenance.

[0019] 2. In the present invention, the explosion-proof shell and the dust adsorption and collection component cooperate to provide reliable safety protection for the device, enabling it to operate stably in harsh chemical environments with explosion risks and corrosive gases. The multi-angle adjustment microwave device and negative pressure adsorption tube of the dust adsorption and collection component respectively deal with water mist and dust interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the main view of an intelligent monitoring device for chemical tank leakage based on multispectral imaging according to the present invention;

[0021] Figure 2 This is a side view structural diagram of an intelligent monitoring device for chemical tank leakage based on multispectral imaging according to the present invention;

[0022] Figure 3 This is a schematic diagram of the separation structure of the main body in an intelligent monitoring device for chemical tank leakage based on multispectral imaging of the present invention;

[0023] Figure 4 This is a schematic diagram of another angle separation structure of the main body of the intelligent monitoring device for chemical tank leakage based on multispectral imaging of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a filter in an intelligent monitoring device for chemical tank leakage based on multispectral imaging according to the present invention;

[0025] Figure 6This invention is a chemical tank leakage intelligent monitoring device based on multispectral imaging Figure 4 A schematic diagram of the enlarged structure at point A;

[0026] Figure 7 This is a schematic structural diagram of a cleaning component in an intelligent monitoring device for chemical tank leakage based on multispectral imaging according to the present invention;

[0027] Figure 8 This is a structural schematic diagram of a dust adsorption and collection component in an intelligent monitoring device for chemical tank leakage based on multispectral imaging according to the present invention;

[0028] Figure 9 This invention is a chemical tank leakage intelligent monitoring device based on multispectral imaging Figure 8 Schematic diagram of the enlarged structure at point B.

[0029] In the figure: 100, explosion-proof housing; 200, drive motor; 300, drive worm; 400, filter wheel multi-spectral acquisition component; 401, gear wheel; 402, electromagnetic coil slot; 403, filter; 403a, super-hydrophobic polytetrafluoroethylene membrane; 403b, silicon dioxide anti-scratch layer; 403c, graphene thermal conductive layer; 404, electromagnetic coil; 405, magnetic field controller; 406, filter mounting slot; 407, memory alloy linear actuator; 500, cleaning component; 501, synchronous pulley structure; 502, bevel gear structure; 503, first slave Driven gear; 504, first rotating gear ring; 505, first ring rail; 506, compressed air purge device; 600, dust adsorption and collection assembly; 601, synchronous connecting rod; 602, second driven gear; 603, second rotating gear ring; 604, second ring rail; 605, negative pressure adsorption tube; 606, negative pressure front end adsorption head; 607, adsorption hole; 608, sleeve rod; 609, sampling guide tube; 610, dust storage tank; 611, multi-angle adjustable microwave device; 612, microfluidic sampler; 700, three-dimensional data collector; 800, microprocessor. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the embodiment of the present invention, referring to Figures 1-4 Shown: An intelligent monitoring device for chemical tank leakage based on multispectral imaging, including a dynamic multispectral acquisition mechanism;

[0032] The dynamic multispectral acquisition mechanism includes a filter wheel multispectral acquisition component 400 and an explosion-proof shell 100 installed on the outside thereof. The dynamic multispectral acquisition mechanism is used to realize multispectral imaging monitoring of chemical storage tank leaks, and adapt to the spectral detection requirements of different leakage media through the adjustment of the filter wheel multispectral acquisition component 400. The explosion-proof shell 100 is used to protect the filter wheel multispectral acquisition component 400. A dust adsorption and acquisition component 600 is installed at the front end of the explosion-proof shell 100, which is used to adsorb and collect dust at the front end of the explosion-proof shell 100, reducing the scattering interference of dust on the dynamic multispectral acquisition mechanism. The explosion-proof shell 100, the dust adsorption and acquisition component 600 and the filter wheel multispectral acquisition component 400 cooperate with each other to reduce the interference of environmental factors on spectral acquisition.

[0033] Specifically: When the monitoring device starts working, first, the dust adsorption and collection component 600 is started, and the negative pressure adsorption tube 605 inside it starts working, forming a negative pressure environment around the detection area at the front end of the explosion-proof shell 100, quickly adsorbing the surrounding dust, reducing the suspension and diffusion of dust in the area, and reducing the scattering interference of dust on the subsequent spectral acquisition process, creating a relatively clean environment for optical detection. Then, according to the pre-set program of the monitoring system or the preliminary detection signal received in real time, the type of possible leakage medium is judged, and the filter wheel multi-spectral acquisition component 400 is operated. During the entire monitoring process, the explosion-proof shell 100 always protects the filter wheel multi-spectral acquisition component 400 from external explosion impact, corrosive gas and other hazards, ensuring the normal operation of internal components, and enabling the monitoring device to operate continuously and stably.

[0034] In some embodiments, according to Figures 1-6 As shown, the filter wheel multispectral acquisition assembly 400 includes a gear wheel disc 401, an electromagnetic coil slot 402, and a memory alloy linear actuator 407. Twelve filter mounting slots 406 are equidistantly spaced along the circumference of the gear wheel disc 401. Each filter mounting slot 406 is installed with a filter corresponding to the characteristic absorption peak wavelength of a specific leakage medium. The filter is a MEMS Fabry-Perot filter, including:

[0035] 3.43μm wavelength filter: for gasoline, diesel and other hydrocarbon leak detection, this wavelength corresponds to the CH stretching vibration absorption peak;

[0036] 6.8μm wavelength filter: used to detect leakage of compounds containing benzene rings, corresponding to the characteristic absorption of CH bending vibration;

[0037] 2.76μm wavelength filter: specially designed for leakage detection of strong acids such as sulfuric acid and hydrochloric acid, corresponding to the OH bond stretching vibration absorption peak;

[0038] 4.26μm wavelength filter: used to detect CO2 leaks, suitable for detecting liquid carbon dioxide storage tanks;

[0039] 3.39μm wavelength filter: for methane leak detection, corresponding to natural gas and other alkanes;

[0040] 5.8μm wavelength filter: used to detect leakage of aldehydes and ketones;

[0041] 7.3μm wavelength filter: for the detection of sulfur-containing compounds such as mercaptans and sulfides;

[0042] 8.6μm wavelength filter: used to detect leakage of fluorinated compounds;

[0043] 9.6μm wavelength filter: for ozone detection, can be used to indirectly determine the leakage of certain oxidation reactions;

[0044] 10.6μm wavelength filter: used to detect CO leakage;

[0045] 11.3μm wavelength filter: for water vapor detection, can assist in judging environmental humidity interference;

[0046] 12.5μm wavelength filter: used to detect nitrogen oxide leakage. A filter 403 is installed in the filter mounting slot 406. The memory alloy linear driver 407 is connected to the filter 403 and is used to drive the filter 403 to perform linear displacement in the filter mounting slot 406. The outer circumference of the filter 403 is provided with a magnetic layer. The electromagnetic coil 404 is embedded in the electromagnetic coil slot 402. When the filter 403 moves into the electromagnetic coil slot 402, the electromagnetic coil 404 in the electromagnetic coil slot 402 generates a magnetic field, which interacts with the external magnetic layer of the filter 403 to drive the filter 403 to rotate the angle to adjust the angle of the filter 403. A magnetic field controller 405 is installed at the center end of the gear wheel 401. The magnetic field controller 405 is used to adjust the strength and direction of the magnetic field generated by the electromagnetic coil 404 to accurately control the angular rotation of the filter 403. , wherein the linear displacement drive of the filter 403 includes but is not limited to the memory alloy linear driver 407, and the angle adjustment includes but is not limited to the cooperation structure of the electromagnetic coil 404 and the magnetic layer, wherein the periphery of the memory alloy linear driver 407 and the electromagnetic coil 404 are arranged, and the electromagnetic coil 404 is supplied with an alternating current to generate an alternating magnetic field, so that the memory alloy linear driver 407 generates an induced current and generates heat, driving the filter 403 to perform linear displacement in the filter mounting slot 406, and wherein the memory alloy linear driver 407 uses a nickel-titanium-based shape memory alloy wire, one end of the nickel-titanium-based shape memory alloy wire is fixed to the bottom of the filter mounting slot 406, and the other end is firmly connected to the connecting block at the edge of the filter 403, when the nickel-titanium-based shape memory alloy wire is subjected to the electromagnetic heat generated by the electromagnetic coil 404, a phase change occurs, resulting in expansion and contraction deformation, driving the filter 403 to achieve linear displacement.

[0047] The filter 403 adopts a three-layer coating structure. The outer layer is a super-hydrophobic polytetrafluoroethylene film 403a, which is used to make the condensed water mist automatically gather into beads and fall off. The middle layer is a silica anti-scratch layer 403b, which is used to reduce the damage rate of dust particle impact. The inner layer is a graphene thermal conductive layer 403c, which is used to control the temperature fluctuation of the lens. The bottom of the gear wheel 401 is meshed with a drive worm 300, and the side end of the drive worm 300 passes through the explosion-proof shell 100 and is connected to the drive motor 200.

[0048] According to an embodiment of the present invention, specifically: after the overall monitoring is started, the drive motor 200 is started, and the gear wheel 401 is driven to rotate by driving the worm 300, and the filter 403 corresponding to the overall preset initial detection wavelength is rotated to the optical path position. At this time, the dust adsorption and collection component 600 and the cleaning component 500 are started synchronously, and the negative pressure adsorption tube 605 forms an annular negative pressure area at the front end of the explosion-proof shell 100, adsorbing the surrounding dust particles, so that the dust concentration in the detection area is rapidly reduced, and then the laser ranging sensor in the cleaning component 500 scans the surface of the filter 403 to establish an initial cleaning state benchmark.

[0049] When the entire device receives a leak warning signal or enters a periodic inspection mode, the magnetic field controller 405 causes an alternating current to flow through the electromagnetic coil 404 based on the characteristic wavelength of the target leaking medium. This generates an induced current in the memory alloy linear actuator 407, causing it to heat up and drive the corresponding filter 403 to form an axial linear displacement in the direction of the electromagnetic coil slot 402. That is, the microprocessor 800 adjusts the frequency and intensity of the alternating current flowing through the electromagnetic coil 404 through the control circuit according to the detection requirements, thereby controlling the heating temperature and time of the memory alloy linear actuator 407. When it is necessary to drive the filter 403 to move quickly, the current intensity is increased, and the heating power is increased, causing the memory alloy wire to quickly heat up and undergo a phase change, achieving rapid displacement. When approaching the target position, the current frequency and intensity are reduced, and fine-tuning is performed with a smaller heating power to achieve precise linear displacement control. At the same time, the integrated temperature sensor inside the electromagnetic coil slot 402 is used to feedback temperature data in real time, forming a closed-loop control to ensure the accuracy and stability of the displacement.

[0050] When the filter 403 completely enters the electromagnetic coil slot 402, the magnetic field controller 405 precisely controls the current of the electromagnetic coil 404 to generate a magnetic field of a specific direction and intensity, so that the magnetic field interacts with the external magnetic layer of the filter 403, driving the filter 403 to rotate around the optical axis until it reaches the preset optimal detection angle. The displacement sensor built into the gear wheel 401 monitors and verifies the position and angle accuracy of the filter 403 in real time. Then, the precisely adjusted filter 403 spectrally filters the light from the surface of the chemical storage tank, allowing only light with the characteristic wavelength of the target leakage medium to pass.

[0051] The filtered light enters the subsequent optical imaging system to form a multispectral image containing leakage information. The microprocessor 800 then performs preliminary processing on the multispectral image to extract spectral feature data. The three-dimensional data collector 700 works synchronously, using a laser projector to project a Gray code pattern onto the surface of the tank. The binocular camera collects the reflected pattern and reconstructs the 3D morphology of the tank surface. The flexible composite sensor array monitors the pressure, temperature and humidity change data on the tank surface in real time. During this operation, the microprocessor 800 integrates and analyzes the multispectral imaging data, 3D morphology data and environmental parameters, and compares them with the preset leakage feature library.

[0052] If a suspected leakage area is detected, the microfluidic sampler 612 automatically starts to collect micro samples of the leaking medium through the negative pressure front-end adsorption head 606 and perform rapid component analysis and verification, so that the microprocessor 800 can comprehensively analyze all data to determine whether there is a leak and the severity of the leak.

[0053] If a leak is confirmed, the system will immediately send out an audible and visual alarm signal, and send information such as the leak location, type, and scale to the remote monitoring center through a wireless transmission structure. At the same time, the system will record complete monitoring data and analysis results to form a historical database, providing a basis for subsequent risk assessment and maintenance decisions.

[0054] After multiple monitorings, the laser ranging sensor monitors the thickness of contaminants on the surface of the filter 403 in real time. When the thickness exceeds a threshold, the compressed air purge device 506 is automatically triggered to clean the surface of the filter 403. After the cleaning is completed, the entire device performs a self-inspection again to ensure that the performance of the filter 403 returns to normal.

[0055] In terms of detection accuracy, the overall device is equipped with 12 filters corresponding to the characteristic wavelengths of different leakage media. Combined with the angle and position adjustment function of the filter 403, it can perform accurate spectral detection on a variety of different types of leakage media, effectively distinguish the spectral characteristics of the tank anti-corrosion coating and the leakage medium, greatly reduce the misjudgment rate, and improve the accuracy of leakage detection. The three-layer coating structure of the filter 403 reduces the damage to the filter 403 caused by external factors, reduces the replacement frequency of the filter 403, and makes the adjustment process of the filter 403 highly automated, reducing manual maintenance operations, reducing maintenance costs and difficulty, and increasing the service life of the equipment.

[0056] In some embodiments, according to Figures 1-4 and Figure 7 As shown, the dynamic multi-spectral acquisition mechanism also includes a cleaning component 500, which includes a laser ranging sensor and a compressed air purge device 506. The laser ranging sensor is used to detect the thickness of contaminants on the surface of the filter 403. When the thickness of the contaminants exceeds a preset threshold, the compressed air purge device 506 is triggered to perform purge. The side end of the compressed air purge device 506 is connected to a first rotating gear ring 504, and the side end of the first rotating gear ring 504 is externally rotatably connected to a first ring rail 505.

[0057] The side end of the first rotating gear ring 504 is meshedly connected to the first driven gear 503, and the side end of the first driven gear 503 is connected to the bevel gear structure 502 through a synchronization rod. The side end of the bevel gear structure 502 is connected to the synchronous pulley structure 501, and the bottom synchronous wheel of the synchronous pulley structure 501 is connected to the side end of the driving worm 300.

[0058] According to an embodiment of the present invention, specifically: during the operation of the device, the laser ranging sensor performs a three-dimensional scan of the surface of the filter 403 at a certain frequency, and calculates the thickness of the contaminant in real time by comparing the current point cloud data with the initial reference data. When the thickness of the contaminant is detected to be greater than, for example, more than 5 μm, the microprocessor 800 sets a threshold value and determines that a cleaning operation is required.

[0059] Then the driving motor 200 outputs power, which is transmitted to the bevel gear structure 502 through the synchronous pulley structure 501. The bevel gear structure 502 changes the rotation direction by 90 degrees and drives the first driven gear 503 to rotate, so that the first driven gear 503 drives the first rotating gear ring 504 meshed with it, so that the compressed air purge device 506 performs a circular motion around the center of the filter 403. At the same time, the external compressed air device is started to compress the clean air, so that the compressed air purge device 506 rotates around the center of the filter 403 and moves along the first ring track 505. The nozzle moves in a trajectory and adjusts the swing angle to perform all-round blowing on the surface of the filter 403. During the blowing process, the laser ranging sensor monitors the cleaning effect in real time. The microprocessor 800 dynamically adjusts the blowing pressure according to the residual pollutants to avoid the blowing angle and blowing time. The compressed air blowing device 506 consists of a nozzle, a ball joint connector and a micro electric push rod, so that the nozzle of the compressed air blowing device 506 is connected to the micro electric push rod through the ball joint connector. The ball joint connector can realize multi-angle rotation of the nozzle in three-dimensional space, that is, the microprocessor 800 drives the ball joint connector to change the angle by controlling the extension and contraction of the micro electric push rod, thereby realizing precise adjustment of the nozzle swing angle, adjusting the opening of the external compressed air valve, and dynamically adjusting the blowing pressure, while effectively cleaning the filter 403, reducing damage to the filter.

[0060] After the purge is completed, the laser ranging sensor scans the surface of the filter 403 again. When it is confirmed that the thickness of the contaminant is low, such as as low as 1 μm, the entire device determines that the cleaning is completed and returns to normal monitoring mode.

[0061] In some embodiments, according to Figure 4 、 Figure 8 and Figure 9 As shown, a three-dimensional data collector 700 is installed on the outer wall surface of the explosion-proof shell 100, which includes a laser projector and a binocular camera. The laser projector is used to project the Gray code pattern, and the binocular camera is used to collect 3D point clouds for real-time reconstruction of the tank surface morphology. A microprocessor 800 is installed on the top of the explosion-proof shell 100.

[0062] The dust adsorption collection assembly 600 includes a multi-angle adjustable microwave device 611, a negative pressure adsorption tube 605 and a microfluidic sampler 612. The multi-angle adjustable microwave device 611 is used to evaporate the water mist on the surface of the tank before detection. The multi-angle adjustable microwave device 611 is composed of a rotatable waveguide, a stepper motor, a rotary joint and a microwave generator. The microwave generator is connected to the transmitting antenna through a rotatable waveguide. A rotary joint driven by a stepper motor is provided at the waveguide connection, so that the microprocessor 800 can accurately adjust the angle of the transmitting antenna by controlling the rotation angle of the stepper motor to achieve water mist evaporation treatment in different areas of the tank surface. To eliminate interference with spectral detection, the negative pressure adsorption tube 605 is used to rotate around the detection area to adsorb dust during monitoring. A negative pressure front-end adsorption head 606 is installed at the front end of the negative pressure adsorption tube 605. The microfluidic sampler 612 includes a microfluidic sampling channel and a built-in spectral detection chip. The microfluidic sampling channel is automatically opened when a suspected leakage area is detected, and a micro sample of the leakage medium is collected through the negative pressure front-end adsorption head 606. The sample flows through the built-in spectral detection chip for rapid component analysis, wherein the negative pressure adsorption tube 605 is used to rotate around the detection area at the front end of the explosion-proof shell 100 to adsorb dust during monitoring.

[0063] The dust adsorption and collection assembly 600 further includes a synchronous connecting rod 601, the side end of the synchronous connecting rod 601 is connected to an electromagnetic blocker, the side end of the electromagnetic blocker is provided with a second driven gear 602, the side end of the second driven gear 602 is meshedly connected to a second rotating gear ring 603, the side end of the second rotating gear ring 603 is externally rotatably connected to a second ring rail 604, and the multi-angle adjustable microwave device 611 and the negative pressure adsorption tube 605 are both provided on the surface of the second ring rail 604.

[0064] A number of adsorption holes 607 are equidistantly arranged on the surface of the negative pressure adsorption tube 605, a sleeve rod 608 is installed at the side end of the negative pressure adsorption tube 605, the side end of the negative pressure front end adsorption head 606 is connected to a sampling guide tube 609, the sampling guide tube 609 is connected to the microfluidic sampler 612, and a dust storage tank 610 is installed on the top wall surface of the sleeve rod 608.

[0065] The dynamic multi-spectral acquisition mechanism further includes a flexible composite sensor array, which is composed of a pressure sensor, a temperature sensor and a humidity sensor. The flexible composite sensor array is attached to the surface of the tank and is used to monitor the pressure distribution, temperature and humidity changes on the surface of the tank in real time.

[0066] The flexible composite sensor array is connected to the external multi-spectral monitoring structure and the microprocessor 800 through a wireless transmission module. The microprocessor 800 is used to fuse the 3D point cloud data collected by the three-dimensional data collector 700, the component analysis data of the microfluidic sampler 612, the environmental perception data of the flexible composite sensor array and the multi-spectral imaging data to analyze and determine whether a leak has occurred in the chemical storage tank and the leakage situation.

[0067] According to the embodiment of the present invention, further specifically: first, the dust adsorption and collection component 600 is started, so that the multi-angle adjustment microwave device 611 starts to operate, and the microwaves it emits can accurately act on the surface of the storage tank, and use the thermal effect of the microwaves to make the water mist absorb energy, quickly evaporate and dissipate, thereby eliminating the interference of the water mist on subsequent detection. At the same time, the negative pressure adsorption tube 605, with the cooperation of the second rotating gear ring 603 and the second ring rail 604, forms a stable negative pressure environment inside the negative pressure adsorption tube 605 through an external vacuum pump, and rotates around the detection area in a circle, so that the negative pressure generated by the adsorption hole 607 can quickly adsorb the surrounding dust. After the dust is sucked into the negative pressure adsorption tube 605, it is transmitted along the pipeline to the dust storage tank 610 on the top wall surface of the sleeve rod 608 for storage, reducing the suspension and diffusion of dust in this area. Optical detection creates a relatively clean environment, in which when the device is in a normal monitoring state and the multi-angle adjustment microwave device 611 and the negative pressure adsorption tube 605 need to rotate around the second ring track 604, the microprocessor 800 controls the electromagnetic blocker to be in a separated state, which does not affect the rotation of the second driven gear 602 and the second rotating gear ring 603, thereby enabling the multi-angle adjustment microwave device 611 and the negative pressure adsorption tube 605 to rotate freely. When it is necessary to stop the rotation, for example, after completing the dust adsorption or water mist evaporation operation, or when the device detects an abnormal situation and needs to lock the component position, the microprocessor 800 energizes the electromagnetic blocker to make it fit tightly with the synchronous connecting rod 601, thereby blocking the rotation of the second driven gear 602 through mechanical connection, thereby achieving position locking of the multi-angle adjustment microwave device 611 and the negative pressure adsorption tube 605.

[0068] Next, according to the pre-set program of the monitoring system or the preliminary detection signal received in real time, the type of possible leakage medium is determined. At this time, the shape memory alloy linear driver 407 starts to operate, and by heating the shape memory alloy material to deform it, the filter 403 corresponding to the characteristic wavelength of the leakage medium in the filter installation slot 406 is driven to perform linear displacement in the filter installation slot 406 and move toward the electromagnetic coil slot 402. When the filter 403 is accurately displaced into the electromagnetic coil slot 402, the electromagnetic coil 404 is energized, and the generated magnetic field interacts with the filter 403, driving the filter 403 to perform angular displacement. The filter 403 is rotated to adjust to the optimal optical angle to ensure that it can accurately filter out light with the characteristic wavelength of the leaking medium. After that, the light on the surface of the chemical storage tank passes through the precisely adjusted filter 403 and enters the subsequent optical detection equipment for multi-spectral imaging monitoring. During this process, the three-layer coating structure of the filter 403 comes into play. The outer super-hydrophobic polytetrafluoroethylene film 403a prevents interference from water mist, the middle silica anti-scratch layer 403b protects the filter 403 from dust damage, and the inner graphene thermal conductive layer 403c maintains the temperature of the filter 403 stable, ensuring the accuracy and stability of optical detection.

[0069] While multispectral imaging monitoring is being carried out, the three-dimensional data collector 700 starts working. The laser projector projects a Gray code pattern onto the surface of the tank, and the binocular camera collects the reflected pattern. By analyzing and processing the collected image data and utilizing the binocular vision principle, the surface morphology of the tank is reconstructed in real time to obtain the three-dimensional geometric information of the tank surface, such as whether there are abnormal shapes such as depressions and protrusions on the surface. At the same time, the flexible composite sensor array attached to the surface of the tank is also working in real time. The pressure sensor monitors the pressure distribution on the surface of the tank, the temperature sensor detects the temperature change on the surface of the tank, and the humidity sensor senses the ambient humidity. These environmental perception data are transmitted to the microprocessor 800 in real time through the wireless transmission module.

[0070] If the system detects a suspected leakage area during the multi-spectral imaging monitoring process, the microfluidic sampler 612 is immediately started, and the negative pressure front-end adsorption head 606, under the action of the negative pressure adsorption tube 605, approaches the suspected leakage area and sucks the leakage medium micro-sample into the microfluidic sampling channel through the sampling guide tube 609. The sample flows through the built-in spectral detection chip, which uses advanced spectral analysis technology to quickly analyze the composition of the sample and obtain specific chemical composition information of the leakage medium.

[0071] Finally, the microprocessor 800 fuses the 3D point cloud data collected by the three-dimensional data collector 700, the component analysis data of the microfluidic sampler 612, the environmental perception data of the flexible composite sensor array, and the multispectral imaging data. By comprehensively analyzing and judging these data, it is determined whether a leak has occurred in the chemical storage tank. If a leak is determined to have occurred, the location of the leak, the type of leaked medium, the severity of the leak, and other information will be further analyzed, and the results will be promptly fed back to the operator so that appropriate treatment measures can be taken.

[0072] The wiring diagram of the magnetic field controller 405, compressed air purge device 506, microfluidic sampler 612, multi-angle adjustable microwave device 611, three-dimensional data collector 700, microprocessor 800, laser ranging sensor, filter and flexible composite sensor array in the present invention is common knowledge in the field. Its working principle is a well-known technology. Its model is selected according to actual use, so the control method and wiring layout are not explained in detail.

[0073] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent chemical tank leakage monitoring device based on multispectral imaging, characterized by: Including dynamic multi-spectral acquisition mechanism; The dynamic multi-spectral acquisition mechanism comprises a filter wheel multi-spectral acquisition component (400) and an explosion-proof housing (100) installed outside the dynamic multi-spectral acquisition mechanism, and is used to realize multi-spectral imaging monitoring of chemical storage tank leakage, and adapts to the spectrum detection requirements of different leakage media through the adjustment of the filter wheel multi-spectral acquisition component (400), and the explosion-proof housing (100) is used to protect the filter wheel multi-spectral acquisition component (400). A dust adsorption and acquisition component (600) is installed at the front end of the explosion-proof housing (100), which is used to adsorb and collect dust at the front end of the explosion-proof housing (100) to reduce the interference of dust on the dynamic multi-spectral acquisition mechanism; The filter wheel multi-spectral acquisition component (400) comprises a gear wheel disc (401), an electromagnetic coil slot (402) and a memory alloy linear driver (407). Twelve filter mounting slots (406) are provided on the gear wheel disc (401) at equal intervals along the circumferential direction. A filter having a characteristic absorption peak wavelength corresponding to a specific leakage medium is installed in each of the filter mounting slots (406). A filter (403) is installed in the filter mounting slot (406). The memory alloy linear driver (407) is connected to the filter (403) and is used to drive the filter (403) to perform linear displacement in the filter mounting slot (406). The outer peripheral side of the optical filter (403) is provided with a magnetic layer, and the electromagnetic coil (404) is embedded in the electromagnetic coil slot (402). When the optical filter (403) is displaced into the electromagnetic coil slot (402), the electromagnetic coil slot (402) is installed inside the optical filter installation slot (406). The electromagnetic coil (404) in the electromagnetic coil slot (402) generates a magnetic field, which interacts with the outer magnetic layer of the optical filter (403) to drive the optical filter (403) to rotate the angle, so as to adjust the angle of the optical filter (403). The central end of the gear wheel (401) is provided with a magnetic field controller (405); The filtered light enters the optical imaging system to form a multispectral image containing leakage information. The microprocessor (800) processes the image and extracts spectral features. The three-dimensional data collector (700) works synchronously to project a Gray code pattern and collect reflection patterns to reconstruct the 3D topography of the tank surface. The flexible composite sensor array monitors the pressure, temperature and humidity of the tank surface in real time. The microprocessor (800) integrates the multispectral data, 3D topography data and environmental parameters and compares them with a preset leakage feature library. If a suspected leakage area is detected, the microfluidic sampler (612) is automatically started to collect a sample of the leaked medium through the negative pressure front end adsorption head (606) and quickly analyze the components. The microprocessor (800) integrates all the data to determine whether there is a leak and the severity of the leak.

2. The intelligent chemical storage tank leakage monitoring device based on multispectral imaging according to claim 1 is characterized in that: The filter (403) adopts a three-layer coating structure, wherein the outer layer is a super-hydrophobic polytetrafluoroethylene film (403a), the middle layer is a silicon dioxide anti-scratch layer (403b), and the inner layer is a graphene heat-conducting layer (403c). The bottom of the gear wheel (401) is meshedly connected with a driving worm (300), and the side end of the driving worm (300) passes through the explosion-proof housing (100) and is connected to a driving motor (200).

3. The intelligent monitoring device for chemical storage tank leakage based on multispectral imaging according to claim 1 is characterized in that: The dynamic multi-spectral acquisition mechanism further comprises a cleaning component (500), wherein the cleaning component (500) comprises a laser ranging sensor and a compressed air purge device (506), wherein the laser ranging sensor is used to detect the thickness of contaminants on the surface of the filter (403), and when the thickness of the contaminants exceeds a preset threshold, the compressed air purge device (506) is triggered to perform purge, wherein the side end of the compressed air purge device (506) is connected to a first rotating gear ring (504), and the side end of the first rotating gear ring (504) is externally rotatably connected to a first ring rail (505).

4. The intelligent chemical storage tank leakage monitoring device based on multispectral imaging according to claim 3 is characterized in that: The side end of the first rotating gear ring (504) is meshedly connected to the first driven gear (503), the side end of the first driven gear (503) is connected to the bevel gear structure (502) through a synchronization rod, and the side end of the bevel gear structure (502) is connected to the synchronous pulley structure (501).

5. The intelligent monitoring device for chemical storage tank leakage based on multispectral imaging according to claim 1, characterized in that: A three-dimensional data collector (700) is installed on the outer wall surface of the explosion-proof housing (100), comprising a laser projector and a binocular camera. The laser projector is used to project a Gray code pattern, and the binocular camera is used to collect a 3D point cloud for real-time reconstruction of the tank surface topography. A microprocessor (800) is installed on the top of the explosion-proof housing (100).

6. The intelligent chemical storage tank leakage monitoring device based on multispectral imaging according to claim 1 is characterized in that: The dust adsorption collection component (600) comprises a multi-angle adjustable microwave device (611), a negative pressure adsorption tube (605) and a microfluidic sampler (612). The multi-angle adjustable microwave device (611) is used to evaporate water mist on the surface of the storage tank before detection. The negative pressure adsorption tube (605) is used to rotate around the detection area to adsorb dust during monitoring. A negative pressure front-end adsorption head (606) is installed at the front end of the negative pressure adsorption tube (605). The microfluidic sampler (612) comprises a microfluidic sampling channel and a built-in spectrum detection chip. The microfluidic sampling channel automatically opens when a suspected leakage area is detected, and a micro sample of the leaked medium is collected through the negative pressure front-end adsorption head (606). The sample flows through the built-in spectrum detection chip for rapid component analysis.

7. The intelligent chemical storage tank leakage monitoring device based on multispectral imaging according to claim 6 is characterized in that: The dust adsorption and collection assembly (600) further includes a synchronous connecting rod (601), the side end of the synchronous connecting rod (601) is connected to an electromagnetic blocker, the side end of the electromagnetic blocker is provided with a second driven gear (602), the side end of the second driven gear (602) is meshedly connected to a second rotating gear ring (603), the side end of the second rotating gear ring (603) is externally rotatably connected to a second ring rail (604), and the multi-angle adjustable microwave device (611) and the negative pressure adsorption tube (605) are both provided on the surface of the second ring rail (604).

8. The intelligent chemical storage tank leakage monitoring device based on multispectral imaging according to claim 6 is characterized in that: A plurality of adsorption holes (607) are equidistantly arranged on the surface of the negative pressure adsorption tube (605), a sleeve rod (608) is arranged at the side end of the negative pressure adsorption tube (605), a sampling guide tube (609) is connected to the side end of the negative pressure front end adsorption head (606), and the sampling guide tube (609) is connected to the microfluidic sampler (612), and a dust storage tank (610) is arranged on the top wall surface of the sleeve rod (608).

9. The intelligent chemical storage tank leakage monitoring device based on multispectral imaging according to claim 1, characterized in that: The dynamic multi-spectral acquisition mechanism further includes a flexible composite sensor array, which is composed of a pressure sensor, a temperature sensor and a humidity sensor. The flexible composite sensor array is attached to the surface of the storage tank and is used to monitor the pressure distribution, temperature and humidity changes on the surface of the storage tank in real time.

10. The intelligent monitoring device for chemical storage tank leakage based on multispectral imaging according to claim 9, characterized in that: The flexible composite sensor array is connected to an external multi-spectral monitoring structure and a microprocessor (800) via a wireless transmission module. The microprocessor (800) is used to fuse 3D point cloud data collected by a three-dimensional data collector (700), component analysis data from a microfluidic sampler (612), and environmental perception data from the flexible composite sensor array with multi-spectral imaging data to analyze and determine whether a chemical storage tank has leaked and the extent of the leak.

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